[Paraview] Visualizing quadrilateral finite elements

[Keng Wit Lim]

Hi,
   
  I tried loading the file (ssaved under extension .vtk) attached below into ParaView, but the elements all came out messed up.  It's a very simple file so I would appreciate if someone can just let me know what's wrong with it.
   
  Thank you in advance.
   
  Keng-Wit
   
  # vtk DataFile Version 3.0
2D scalar data
ASCII
  DATASET UNSTRUCTURED_GRID
POINTS 9 float
0 0 0
0 10 0
0 20 0
10 0 0
10 10 0
10 20 0
20 0 0
20 10 0
20 20 0
  CELLS 4 20
4 1 4 5 2
4 2 5 6 3
4 4 7 8 5
4 5 8 9 6
  CELL_TYPES 4
9
9
9
9


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